Old age spells risk for injury from falls that might not cause injury to a younger person. Every year, about one-third of those 65 years old and over half of those 80 years old fall. Falls are the leading cause of injury and death for old people.
Transanal hemorrhoidal dearterialization (or THD) is a minimally invasive surgical procedure for the treatment of internal hemorrhoids. It is the procedure of choice in the event that conservative treatment has failed and a patient is still experiencing symptoms from their internal hemorrhoids.inimally Invasive THD Procedure. THD uses a Doppler ultrasound to locate the terminating branches of the hemorrhoidal arteries 2â3 cm above the dentate line. Once the artery is located, the surgeon uses an absorbable suture to ligate or âtie-offâ the arterial blood flow.
The amount of the nonlinear distortion is measured using a sine wave as a test signal. THD is defined as the ratio of the geometric mean of the harmonic components (v2, v3, v4, v5, ... ) and the fundamental component (v1). It is expressed in dB or %, and lower numbers are considered to be better.DSSF3's THD analyzer is designed for measuring the distortion of input/output systems, like an amplifier and a soundcard. Internal signal generator is used to feed a test signal to the device under test, and its output is measured.Basic measurement configuration is as follows.f the soundcard's input and output are connected directly (R ch: ----), distortion of the soundcard itself can be measured. This is called a loopback test, and is very important to perform an accurate measurement.